“天苍苍,野茫茫,风吹草低见牛羊”描述的是下列哪种生态系统出现的景象( )
A.森林生态系统
B.草原生态系统
C.农田生系统
D.城市生态系统
答案:B
完成句子。
根据所给提示,完成句子。每空一词,含缩略词。
1. Get up early, or you will be late.(改为同义句)
_____ you don't get up early, you _____ be late.
2. The kid is playing the piano at the school music club. (对划线部分提问)
_______ is the kid ______ the piano?
3. There were many students in this school last year. (改为否定句)
There ______ _______ many students in this school last year.
4. We hope _____ _____ (see) him be happy again(用括号内所给词的适当形式填空)
5. I would like more time to ______ things _____ (仔细考虑).(根据汉语提示完成句子)
弥漫性泛细支气管炎(DPB)早期的胸片表现最常见的是( )
A.肺气肿B.双下肺弥漫的小结节影C.弥漫的网状结节状影D.双肺多发囊状支气管扩张E.双下肺毛玻璃状影